6473731640 has 64 divisors (see below), whose sum is σ = 15242009760. Its totient is φ = 2471938560.

The previous prime is 6473731619. The next prime is 6473731679. The reversal of 6473731640 is 461373746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37175 + ... + 119705.

Almost surely, 2^6473731640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6473731640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7621004880).

6473731640 is an abundant number, since it is smaller than the sum of its proper divisors (8768278120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6473731640 is a wasteful number, since it uses less digits than its factorization.

6473731640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82632 (or 82628 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 6473731640 is about 80459.5031055997. The cubic root of 6473731640 is about 1863.7381598779.

The spelling of 6473731640 in words is "six billion, four hundred seventy-three million, seven hundred thirty-one thousand, six hundred forty".